US9263736B2ActiveUtilityA1

Positive electrode material for lithium ion secondary battery, positive electrode for lithium ion secondary battery, and lithium ion secondary battery

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Assignee: TDK CORPPriority: Mar 27, 2012Filed: Mar 18, 2013Granted: Feb 16, 2016
Est. expiryMar 27, 2032(~5.7 yrs left)· nominal 20-yr term from priority
Inventors:Keitaro OtsukiAtsushi SanoTomohiko Kato
H01M 4/131H01M 4/5825H01M 4/136H01M 2004/028H01M 4/364H01M 4/485H01M 2004/021H01M 10/0525Y02E60/122Y02E60/10
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PatentIndex Score
0
Cited by
17
References
11
Claims

Abstract

A positive electrode material for a lithium ion secondary battery contains a first compound represented by Li 3 V 2 (PO 4 ) 3 and one or more second compounds selected from vanadium oxide and lithium vanadium phosphate.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
       1. A positive electrode material for a lithium ion secondary battery, comprising:
 a first compound represented by Li 3 V 2 (PO 4 ) 3 ; and 
 a second compound selected from vanadium oxide, lithium vanadium oxide, and lithium vanadium phosphate, wherein the content of the second compound relative to the first compound is 0.1 wt. % or more and 5 wt. % or less. 
 
     
     
       2. The positive electrode material for a lithium ion secondary battery according to  claim 1 , wherein the second compound contains at least one of V 2 O 5 , LiV 2 O 4 , LiV 3 O 8 , and LiVOPO 4 . 
     
     
       3. The positive electrode material for a lithium ion secondary battery according to  claim 1 , wherein the content of the second compound relative to the first compound is 0.5 wt. % or more and 1.5 wt. % or less. 
     
     
       4. The positive electrode material for a lithium ion secondary battery according to  claim 3 , wherein the first compound has a particle diameter of 100 nm to 10 μm. 
     
     
       5. The positive electrode material for a lithium ion secondary battery according to  claim 4 , wherein the second compound has a particle diameter of 10 nm to 1 μm. 
     
     
       6. The positive electrode material for a lithium ion secondary battery according to  claim 1 , wherein the first compound has a particle diameter of 100 nm to 10 μm. 
     
     
       7. The positive electrode material for a lithium ion secondary battery according to  claim 6 , wherein the second compound has a particle diameter of 10 nm to 1 μm. 
     
     
       8. The positive electrode material for a lithium ion secondary battery according to  claim 1 , wherein the second compound has a particle diameter of 10 nm to 1 μm. 
     
     
       9. A lithium ion secondary battery comprising the positive electrode for a lithium ion secondary battery according to  claim 8 . 
     
     
       10. The positive electrode material for a lithium ion secondary battery according to  claim 1 , wherein the second compound has a smaller particle diameter than that of the first compound. 
     
     
       11. A positive electrode for a lithium ion secondary battery, comprising the positive electrode material for a lithium ion secondary battery according to  claim 1 .

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